NGK Laser Iridium vs NGK Iridium Ix

[Hussien]

Hi

I will buy spark plugs, but there are two types. They are Laser Iridium and Iridium Ix.

NGK Iridium/Platinum Spark Plug (64$ US)


NGK Single Iridium Spark Plug (54$ US)


Which one should I buy?

I have two cars. One has L98 engine and the other car has LS2 engine.

 

[Hussien]

Both the laser iridium and the ix iridium have laser welded center electrodes. The biggest difference, other than the $5 difference, is the platinum disc welded to the ground electrode on the laser iridiums. Another difference that ngk doesnt mention is the fact that the ground electrode is tapered at the end on the ix plugs. The laser iridium is an oe approved long life replacement good for 100k miles, while the ix is not an oe approved replacement, and rated to 60k miles. This is according to ngk's website and their tech guy.

http://www.ngksparkplugs.com/pdf/DYK_LaserIridium_vs_Iridium IX.pdf

I don't know much about spark plugs, but I read the pdf file. I understand that the both types are the same, but the only difference is that the laser iridium lasts more than the iridium ix. is that true?

 

[SkitSoHulk]

Ngk are the worst spark plugs loool.

 

[TAS1981]

Really? I have never bought anything else and I have never had a single spark plug problem?

 

[Pollushon]

The Lasers are better coated (platinum on the electrode) and have longer service intervals than the Ix (about 60k kms more), that's about it. Whether they actually last the distance is another thing.

I run NGK Ix on my boosted setup and they've been fantastic. Yanked a couple out the other day to check them and after 30k km they look almost as good as the day I whacked them in.

$70 for the six from the UK.

 

[Hussien]

so, what do you recommend me to buy?

 

[Grennan]

Ngk are the worst spark plugs loool.

Please tell me more.

/sarcasm.

I wouldnt bother with the upgraded laser version, theyre a longer life plug and thats about it. Theres nothing to special about them spark or performance wise.

Personally I wouldnt be leaving plugs in for that long regardless.

 

[Hussien]

Do these fit for my car?

NGK 7397 TR5IX Iridium IX Spark Plug GM LS1 LS6 Taylor 79203 10 4 MM Wires | eBay

NGK 7397 Iridium Spark Plugs TR5IX 4 Pcs New | eBay

 

[IBLOWN]

Plugs are plugs. Get the right heat range in NGK and put them in. Iridiums just last longer, but not 10 times the price longer...

 

[Pollushon]

Depends on if you have to strip your inlet manifold every time you change them